I hope you are having a peaceful Christmas and are able to enjoy today, or at least look forward to a day of rest in the week ahead.
If this is a difficult time for you because of bereavement, Cruse have extra, trained volunteers on their helpline over the holidays. The helpline is 0844 477 9400 and it is open from 9.30am until 5pm from 25th - 28th December, 9.30am until 8pm from the 29th - 31st December, and 9.30am until 5pm on New Year's Day.
The Samaritans are available to talk 24 hours a day, every day. Their helpline is 116 123 if you are calling from the UK, and it is free to ring. Other details are here.
There are lots of reasons why people can feel less than merry over the holidays, especially if someone is alone, or feels alone. Mind has some ideas here for self-care and treatment if you are suffering from a low mood.